Definition: In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Input: Context: Pinnixa chaetopterana the tube pea crab is a small decapod crustacean that lives harmlessly within the tube of the polychaete worm Chaetopterus variopedatus.
Question: The document can be classified to which topic? 
Options: 1)Village, 2)MeanOfTransportation, 3)NaturalPlace, 4)Animal, 5)Building

4